The largest tornado in history

Since the 19th century, the accuracy of weather forecasts has greatly improved, and weather radar can detect various disaster storms such as tornadoes and hurricanes.

In 1995, a land tornado occurred in Ardmore, Oklahoma, USA, and heavy objects such as roofs were blown dozens of miles away. Most debris falls on the left side of the landspout channel, often with well-defined landing zones based on weight. Lighter fragments may fly more than 300 kilometers before landing.

A tornado strikes suddenly and violently, producing the strongest winds on the ground. Tornadoes are second only to lightning in the number of deaths caused each year in the United States. It also causes serious and often devastating damage to buildings.

Under the attack of a strong tornado, the roof of the house will fly up like a hang glider. Once the roof is swept away, the rest of the house will disintegrate as well. Therefore, if the stability of the roof can be strengthened when building a house, it will help prevent huge losses when a tornado passes through.

Tornadoes are usually extremely fast. It is not surprising that the wind speed is 100 meters per second, and even reaches more than 175 meters per second, which is five or six times greater than a Category 12 typhoon. The scope of the wind is very small, generally only 25 to 100 meters in diameter, and only in rare cases the diameter reaches more than one kilometer; the time from occurrence to disappearance only takes a few minutes, at most a few hours.

A tornado is also very powerful. There was a tornado in Shanghai on September 24, 1956. It easily "lifted" a large oil storage barrel weighing 220,000 kilograms to an altitude of 15 meters, and then threw it 120 meters away.

Tornadoes, also called cyclones in the United States, are a common natural phenomenon. Cyclones are often more destructive than earthquakes.

At 4 pm on May 30, 1879, two dark and thick clouds merged together in the sky over northern Kansas. After 15 minutes, a vortex formed at the lower end of the clouds. The vortex grew rapidly and turned into a huge wind pillar that towered over the sky. Within three hours, it wreaked havoc across the entire state like an evil dragon, leaving no one safe wherever it went. However, the strangest thing happened at the beginning. The tornado vortex crossed a small river and encountered a cliff. Obviously, it could not surpass this obstacle. The vortex turned westward, where there happened to be a newly built 75 meter long railway bridge. The tornado vortex actually "plucked" it from the stone pier, twisted it a few times and threw it into the water.

On May 27, 1999, four counties in central Texas, including the capital Austin, were hit by a huge tornado, killing at least 32 people and injuring dozens more. According to reports, more than 50 houses collapsed and more than 30 people were killed in the tornado in the town of Jarrell, 40 miles north of Austin. The area of ??damage was a mile long and 200 yards wide. This is the second area in the United States to be hit by a tornado after the city of Miami was hit by a tornado on May 13.